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CY26049-36

Cypress Semiconductor
Part Number CY26049-36
Manufacturer Cypress Semiconductor
Description Global Communications Clock Generator
Published Apr 15, 2011
Detailed Description CY26049-36 FailSafe™ PacketClock™ Global Communications Clock Generator Features • Fully integrated phase-locked loop (...
Datasheet PDF File CY26049-36 PDF File

CY26049-36
CY26049-36

Overview
CY26049-36 FailSafe™ PacketClock™ Global Communications Clock Generator Features • Fully integrated phase-locked loop (PLL) • FailSafe output • PLL driven by a crystal oscillator that is phase aligned with external reference • Output frequencies selectable and/or programmed to standard communication frequencies • Low-jitter, high-accuracy outputs • Commercial and Industrial operation • 3.
3V ± 5% operation • 16-lead TSSOP • When reference is in range, SAFE pin is driven high.
• When reference is off, DCXO maintains clock outputs.
SAFE pin is low.
• DCXO maintains continuous operation should the input reference clock fail • Glitch-free transition simplifies system design • Selectable output clock rates include T1/DS1, E1, T3/DS3, E3, and OC-3.
• Works with commonly available, low-cost 18.
432-MHz crystal • Zero-ppm error for all output frequencies • Performance guaranteed for applications that require an extended temperature range • Compatible across industry standard design platforms • Industry standard package with 6.
4 x 5.
0 mm2 footprint and a height profile of just 1.
1 mm.
Benefits • Integrated high-performance PLL tailored for telecommunications frequency synthesis eliminates the need for external loop filter components Logic Block Diagram external pullable crystal (18.
432 MHz) XIN Input reference (typical 8 kHz) ICLK TM FAILSAFE CONTROL XOUT DIGITAL CONTROLLED CRYSTAL OSCILLATOR PHASE LOCKED LOOP CLK OUTPUT DIVIDERS CLK/2 FS[3:0] frequency select 8K SAFE High=ICLK detected Pin Configuration CY26049-36 16-pin TSSOP Top View ICLK 1 8K 2 FS1 3 FS2 4 VDD 5 VSS 6 CLK/2 7 XIN 8 16 NC 15 CLK 14 FS0 13 FS3 12 VDD 11 VSS 10 SAFE 9 XOUT www.
DataSheet4U.
com Cypress Semiconductor Corporation Document #: 38-07415 Rev.
*C • 3901 North First Street • San Jose, CA 95134 • 408-943-2600 Revised July 16, 2004 CY26049-36 Pin Definitions Pin Name Pin Number ICLK 8K FS1 FS2 VDD VSS CLK/2 XIN XOUT SAFE VSS VDD FS3 FS0 CLK NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pi...


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